Some zinc ores contain zinc sulfide.
In the first stage of extracting zinc from zinc sulfide, the zinc sulfide, ZnS\text{ZnS}ZnS, is heated in air (reacting with oxygen, O2\text{O}_2O2) to form zinc oxide, ZnO\text{ZnO}ZnO, and sulfur dioxide, SO2\text{SO}_2SO2.
Write the balanced symbol equation for this reaction.